What's the general rule of thumb, regarding spin rate, when changing the weight ports on 910, or 913 drivers and fairway woods? I've currently got a 910D2 with a Project X 7B3. The club plays to 44.5" (tipped down from 45.5")... I'd like to knock some spin off of my drives. I've been playing with a 7g weight in the head, but today played with a 5g weight. Spin seemed worse. I put in a 9g weight this evening, and will give it a go tomorrow or Tuesday. Thanks.